<?php
/**
 * PHPMailer RFC821 SMTP email transport class.
 * PHP Version 5
 * @package PHPMailer
 * @link https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project
 * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author Brent R. Matzelle (original founder)
 * @copyright 2014 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @note This program is distributed in the hope that it will be useful - WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 */

/**
 * PHPMailer RFC821 SMTP email transport class.
 * Implements RFC 821 SMTP commands and provides some utility methods for sending mail to an SMTP server.
 * @package PHPMailer
 * @author Chris Ryan <unknown@example.com>
 * @author Marcus Bointon <phpmailer@synchromedia.co.uk>
 */
class SMTP
{
	/**
	 * The PHPMailer SMTP version number.
	 * @type string
	 */
	const VERSION = '5.2.9';

	/**
	 * SMTP line break constant.
	 * @type string
	 */
	const CRLF = "\r\n";

	/**
	 * The SMTP port to use if one is not specified.
	 * @type integer
	 */
	const DEFAULT_SMTP_PORT = 25;

	/**
	 * The maximum line length allowed by RFC 2822 section 2.1.1
	 * @type integer
	 */
	const MAX_LINE_LENGTH = 998;

	/**
	 * Debug level for no output
	 */
	const DEBUG_OFF = 0;

	/**
	 * Debug level to show client -> server messages
	 */
	const DEBUG_CLIENT = 1;

	/**
	 * Debug level to show client -> server and server -> client messages
	 */
	const DEBUG_SERVER = 2;

	/**
	 * Debug level to show connection status, client -> server and server -> client messages
	 */
	const DEBUG_CONNECTION = 3;

	/**
	 * Debug level to show all messages
	 */
	const DEBUG_LOWLEVEL = 4;

	/**
	 * The PHPMailer SMTP Version number.
	 * @type string
	 * @deprecated Use the `VERSION` constant instead
	 * @see SMTP::VERSION
	 */
	public $Version = '5.2.9';

	/**
	 * SMTP server port number.
	 * @type integer
	 * @deprecated This is only ever used as a default value, so use the `DEFAULT_SMTP_PORT` constant instead
	 * @see SMTP::DEFAULT_SMTP_PORT
	 */
	public $SMTP_PORT = 25;

	/**
	 * SMTP reply line ending.
	 * @type string
	 * @deprecated Use the `CRLF` constant instead
	 * @see SMTP::CRLF
	 */
	public $CRLF = "\r\n";

	/**
	 * Debug output level.
	 * Options:
	 * * self::DEBUG_OFF (`0`) No debug output, default
	 * * self::DEBUG_CLIENT (`1`) Client commands
	 * * self::DEBUG_SERVER (`2`) Client commands and server responses
	 * * self::DEBUG_CONNECTION (`3`) As DEBUG_SERVER plus connection status
	 * * self::DEBUG_LOWLEVEL (`4`) Low-level data output, all messages
	 * @type integer
	 */
	public $do_debug = self::DEBUG_OFF;

	/**
	 * How to handle debug output.
	 * Options:
	 * * `echo` Output plain-text as-is, appropriate for CLI
	 * * `html` Output escaped, line breaks converted to `<br>`, appropriate for browser output
	 * * `error_log` Output to error log as configured in php.ini
	 *
	 * Alternatively, you can provide a callable expecting two params: a message string and the debug level:
	 * <code>
	 * $smtp->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";};
	 * </code>
	 * @type string|callable
	 */
	public $Debugoutput = 'echo';

	/**
	 * Whether to use VERP.
	 * @link http://en.wikipedia.org/wiki/Variable_envelope_return_path
	 * @link http://www.postfix.org/VERP_README.html Info on VERP
	 * @type boolean
	 */
	public $do_verp = false;

	/**
	 * The timeout value for connection, in seconds.
	 * Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2
	 * This needs to be quite high to function correctly with hosts using greetdelay as an anti-spam measure.
	 * @link http://tools.ietf.org/html/rfc2821#section-4.5.3.2
	 * @type integer
	 */
	public $Timeout = 300;

	/**
	 * How long to wait for commands to complete, in seconds.
	 * Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2
	 * @type integer
	 */
	public $Timelimit = 300;

	/**
	 * The socket for the server connection.
	 * @type resource
	 */
	protected $smtp_conn;

	/**
	 * Error message, if any, for the last call.
	 * @type array
	 */
	protected $error = array();

	/**
	 * The reply the server sent to us for HELO.
	 * If null, no HELO string has yet been received.
	 * @type string|null
	*/
	protected $helo_rply = null;

	/**
	 * The most recent reply received from the server.
	 * @type string
	 */
	protected $last_reply = '';

	/**
	 * Output debugging info via a user-selected method.
	 * @see SMTP::$Debugoutput
	 * @see SMTP::$do_debug
	 * @param string $str Debug string to output
	 * @param integer $level The debug level of this message; see DEBUG_* constants
	 * @return void
	 */
	protected function edebug($str, $level = 0)
	{
		if ($level > $this->do_debug) {
			return;
		}
		if (is_callable($this->Debugoutput)) {
			call_user_func($this->Debugoutput, $str, $this->do_debug);
			return;
		}
		switch ($this->Debugoutput) {
			case 'error_log':
				//Don't output, just log
				error_log($str);
				break;
			case 'html':
				//Cleans up output a bit for a better looking, HTML-safe output
				echo htmlentities(
				preg_replace('/[\r\n]+/', '', $str),
				ENT_QUOTES,
				'UTF-8'
						)
						. "<br>\n";
						break;
			case 'echo':
			default:
				//Normalize line breaks
				$str = preg_replace('/(\r\n|\r|\n)/ms', "\n", $str);
				echo gmdate('Y-m-d H:i:s') . "\t" . str_replace(
						"\n",
						"\n                   \t                  ",
						trim($str)
				)."\n";
		}
	}

	/**
	 * Connect to an SMTP server.
	 * @param string $host SMTP server IP or host name
	 * @param integer $port The port number to connect to
	 * @param integer $timeout How long to wait for the connection to open
	 * @param array $options An array of options for stream_context_create()
	 * @access public
	 * @return boolean
	 */
	public function connect($host, $port = null, $timeout = 30, $options = array())
	{
		static $streamok;
		//This is enabled by default since 5.0.0 but some providers disable it
		//Check this once and cache the result
		if (is_null($streamok)) {
			$streamok = function_exists('stream_socket_client');
		}
		// Clear errors to avoid confusion
		$this->error = array();
		// Make sure we are __not__ connected
		if ($this->connected()) {
			// Already connected, generate error
			$this->error = array('error' => 'Already connected to a server');
			return false;
		}
		if (empty($port)) {
			$port = self::DEFAULT_SMTP_PORT;
		}
		// Connect to the SMTP server
		$this->edebug(
				"Connection: opening to $host:$port, t=$timeout, opt=".var_export($options, true),
				self::DEBUG_CONNECTION
		);
		$errno = 0;
		$errstr = '';
		if ($streamok) {
			$socket_context = stream_context_create($options);
			//Suppress errors; connection failures are handled at a higher level
			$this->smtp_conn = @stream_socket_client(
					$host . ":" . $port,
					$errno,
					$errstr,
					$timeout,
					STREAM_CLIENT_CONNECT,
					$socket_context
			);
		} else {
			//Fall back to fsockopen which should work in more places, but is missing some features
			$this->edebug(
					"Connection: stream_socket_client not available, falling back to fsockopen",
					self::DEBUG_CONNECTION
			);
			$this->smtp_conn = fsockopen(
					$host,
					$port,
					$errno,
					$errstr,
					$timeout
			);
		}
		// Verify we connected properly
		if (!is_resource($this->smtp_conn)) {
			$this->error = array(
					'error' => 'Failed to connect to server',
					'errno' => $errno,
					'errstr' => $errstr
			);
			$this->edebug(
					'SMTP ERROR: ' . $this->error['error']
					. ": $errstr ($errno)",
					self::DEBUG_CLIENT
					);
					return false;
		}
		$this->edebug('Connection: opened', self::DEBUG_CONNECTION);
		// SMTP server can take longer to respond, give longer timeout for first read
		// Windows does not have support for this timeout function
		if (substr(PHP_OS, 0, 3) != 'WIN') {
		$max = ini_get('max_execution_time');
		if ($max != 0 && $timeout > $max) { // Don't bother if unlimited
		@set_time_limit($timeout);
		}
		stream_set_timeout($this->smtp_conn, $timeout, 0);
		}
		// Get any announcement
		$announce = $this->get_lines();
		$this->edebug('SERVER -> CLIENT: ' . $announce, self::DEBUG_SERVER);
		return true;
	}

	/**
	* Initiate a TLS (encrypted) session.
	* @access public
     * @return boolean
     */
     public function startTLS()
     {
     if (!$this->sendCommand('STARTTLS', 'STARTTLS', 220)) {
      return false;
}
// Begin encrypted connection
     if (!stream_socket_enable_crypto(
     	$this->smtp_conn,
     	true,
     	STREAM_CRYPTO_METHOD_TLS_CLIENT
     )) {
     	return false;
     }
     return true;
     }

     /**
     * Perform SMTP authentication.
     * Must be run after hello().
     * @see hello()
     * @param string $username    The user name
     	* @param string $password    The password
     	* @param string $authtype    The auth type (PLAIN, LOGIN, NTLM, CRAM-MD5)
     	* @param string $realm       The auth realm for NTLM
     	* @param string $workstation The auth workstation for NTLM
     	* @access public
     	* @return boolean True if successfully authenticated.
     	*/
     	public function authenticate(
     	$username,
     	$password,
     	$authtype = 'LOGIN',
     	$realm = '',
     	$workstation = ''
     	) {
     	if (empty($authtype)) {
     	$authtype = 'LOGIN';
}
switch ($authtype) {
case 'PLAIN':
// Start authentication
if (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) {
return false;
}
// Send encoded username and password
if (!$this->sendCommand(
'User & Password',
base64_encode("\0" . $username . "\0" . $password),
235
		)
		) {
		return false;
}
break;
case 'LOGIN':
// Start authentication
		if (!$this->sendCommand('AUTH', 'AUTH LOGIN', 334)) {
return false;
}
if (!$this->sendCommand("Username", base64_encode($username), 334)) {
return false;
}
if (!$this->sendCommand("Password", base64_encode($password), 235)) {
return false;
}
break;
case 'NTLM':
/*
* ntlm_sasl_client.php
* Bundled with Permission
*
* How to telnet in windows:
	* http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx
	* PROTOCOL Docs http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication
	*/
	require_once 'extras/ntlm_sasl_client.php';
	$temp = new stdClass();
		$ntlm_client = new ntlm_sasl_client_class;
		//Check that functions are available
		if (!$ntlm_client->Initialize($temp)) {
		$this->error = array('error' => $temp->error);
		$this->edebug(
				'You need to enable some modules in your php.ini file: '
				. $this->error['error'],
				self::DEBUG_CLIENT
		);
	return false;
}
//msg1
		$msg1 = $ntlm_client->TypeMsg1($realm, $workstation); //msg1

		if (!$this->sendCommand(
		'AUTH NTLM',
		'AUTH NTLM ' . base64_encode($msg1),
		334
		)
		) {
		return false;
		}
		//Though 0 based, there is a white space after the 3 digit number
		//msg2
		$challenge = substr($this->last_reply, 3);
		$challenge = base64_decode($challenge);
		$ntlm_res = $ntlm_client->NTLMResponse(
		substr($challenge, 24, 8),
				$password
		);
		//msg3
		$msg3 = $ntlm_client->TypeMsg3(
		$ntlm_res,
		$username,
		$realm,
		$workstation
);
// send encoded username
return $this->sendCommand('Username', base64_encode($msg3), 235);
case 'CRAM-MD5':
	// Start authentication
			if (!$this->sendCommand('AUTH CRAM-MD5', 'AUTH CRAM-MD5', 334)) {
			return false;
                }
                // Get the challenge
                $challenge = base64_decode(substr($this->last_reply, 4));

                // Build the response
	$response = $username . ' ' . $this->hmac($challenge, $password);

	// send encoded credentials
	return $this->sendCommand('Username', base64_encode($response), 235);
}
return true;
}

/**
* Calculate an MD5 HMAC hash.
		* Works like hash_hmac('md5', $data, $key)
		* in case that function is not available
		* @param string $data The data to hash
	* @param string $key  The key to hash with
	* @access protected
	* @return string
	*/
	protected function hmac($data, $key)
	{
	if (function_exists('hash_hmac')) {
	return hash_hmac('md5', $data, $key);
}

// The following borrowed from
// http://php.net/manual/en/function.mhash.php#27225

// RFC 2104 HMAC implementation for php.
// Creates an md5 HMAC.
// Eliminates the need to install mhash to compute a HMAC
// by Lance Rushing

$bytelen = 64; // byte length for md5
if (strlen($key) > $bytelen) {
$key = pack('H*', md5($key));
}
$key = str_pad($key, $bytelen, chr(0x00));
$ipad = str_pad('', $bytelen, chr(0x36));
$opad = str_pad('', $bytelen, chr(0x5c));
$k_ipad = $key ^ $ipad;
$k_opad = $key ^ $opad;

		return md5($k_opad . pack('H*', md5($k_ipad . $data)));
}

		/**
		* Check connection state.
		* @access public
		* @return boolean True if connected.
		*/
    public function connected()
    {
    	if (is_resource($this->smtp_conn)) {
    	$sock_status = stream_get_meta_data($this->smtp_conn);
    	if ($sock_status['eof']) {
    	// The socket is valid but we are not connected
    	$this->edebug(
    	'SMTP NOTICE: EOF caught while checking if connected',
    	self::DEBUG_CLIENT
	);
	$this->close();
	return false;
}
return true; // everything looks good
}
return false;
}

/**
* Close the socket and clean up the state of the class.
* Don't use this function without first trying to use QUIT.
* @see quit()
* @access public
* @return void
*/
public function close()
{
$this->error = array();
$this->helo_rply = null;
if (is_resource($this->smtp_conn)) {
// close the connection and cleanup
fclose($this->smtp_conn);
$this->smtp_conn = null; //Makes for cleaner serialization
		$this->edebug('Connection: closed', self::DEBUG_CONNECTION);
}
}

/**
* Send an SMTP DATA command.
* Issues a data command and sends the msg_data to the server,
* finializing the mail transaction. $msg_data is the message
* that is to be send with the headers. Each header needs to be
* on a single line followed by a <CRLF> with the message headers
* and the message body being separated by and additional <CRLF>.
* Implements rfc 821: DATA <CRLF>
* @param string $msg_data Message data to send
* @access public
* @return boolean
*/
public function data($msg_data)
{
//This will use the standard timelimit
if (!$this->sendCommand('DATA', 'DATA', 354)) {
return false;
}

/* The server is ready to accept data!
* According to rfc821 we should not send more than 1000 characters on a single line (including the CRLF)
* so we will break the data up into lines by \r and/or \n then if needed we will break each of those into
* smaller lines to fit within the limit.
	* We will also look for lines that start with a '.' and prepend an additional '.'.
			* NOTE: this does not count towards line-length limit.
			*/

			// Normalize line breaks before exploding
			$lines = explode("\n", str_replace(array("\r\n", "\r"), "\n", $msg_data));

			/* To distinguish between a complete RFC822 message and a plain message body, we check if the first field
			* of the first line (':' separated) does not contain a space then it _should_ be a header and we will
			* process all lines before a blank line as headers.
			*/

			$field = substr($lines[0], 0, strpos($lines[0], ':'));
			$in_headers = false;
			if (!empty($field) && strpos($field, ' ') === false) {
			$in_headers = true;
}

foreach ($lines as $line) {
$lines_out = array();
if ($in_headers and $line == '') {
$in_headers = false;
}
//We need to break this line up into several smaller lines
	//This is a small micro-optimisation: isset($str[$len]) is equivalent to (strlen($str) > $len)
	while (isset($line[self::MAX_LINE_LENGTH])) {
	//Working backwards, try to find a space within the last MAX_LINE_LENGTH chars of the line to break on
	//so as to avoid breaking in the middle of a word
	$pos = strrpos(substr($line, 0, self::MAX_LINE_LENGTH), ' ');
	if (!$pos) { //Deliberately matches both false and 0
	//No nice break found, add a hard break
	$pos = self::MAX_LINE_LENGTH - 1;
	$lines_out[] = substr($line, 0, $pos);
	$line = substr($line, $pos);
	} else {
	//Break at the found point
	$lines_out[] = substr($line, 0, $pos);
	//Move along by the amount we dealt with
		$line = substr($line, $pos + 1);
}
//If processing headers add a LWSP-char to the front of new line RFC822 section 3.1.1
if ($in_headers) {
$line = "\t" . $line;
}
}
$lines_out[] = $line;

//Send the lines to the server
foreach ($lines_out as $line_out) {
//RFC2821 section 4.5.2
if (!empty($line_out) and $line_out[0] == '.') {
$line_out = '.' . $line_out;
}
$this->client_send($line_out . self::CRLF);
}
}

//Message data has been sent, complete the command
//Increase timelimit for end of DATA command
$savetimelimit = $this->Timelimit;
$this->Timelimit = $this->Timelimit * 2;
$result = $this->sendCommand('DATA END', '.', 250);
//Restore timelimit
$this->Timelimit = $savetimelimit;
return $result;
}

/**
* Send an SMTP HELO or EHLO command.
* Used to identify the sending server to the receiving server.
		* This makes sure that client and server are in a known state.
* Implements RFC 821: HELO <SP> <domain> <CRLF>
* and RFC 2821 EHLO.
* @param string $host The host name or IP to connect to
* @access public
* @return boolean
*/
public function hello($host = '')
{
//Try extended hello first (RFC 2821)
return (boolean)($this->sendHello('EHLO', $host) or $this->sendHello('HELO', $host));
}

/**
* Send an SMTP HELO or EHLO command.
* Low-level implementation used by hello()
* @see hello()
	* @param string $hello The HELO string
	* @param string $host The hostname to say we are
	* @access protected
	* @return boolean
	*/
	protected function sendHello($hello, $host)
	{
	$noerror = $this->sendCommand($hello, $hello . ' ' . $host, 250);
	$this->helo_rply = $this->last_reply;
	return $noerror;
	}

	/**
	* Send an SMTP MAIL command.
	* Starts a mail transaction from the email address specified in
	* $from. Returns true if successful or false otherwise. If True
		* the mail transaction is started and then one or more recipient
		* commands may be called followed by a data command.
		* Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
		* @param string $from Source address of this message
			* @access public
			* @return boolean
			*/
			public function mail($from)
			{
			$useVerp = ($this->do_verp ? ' XVERP' : '');
			return $this->sendCommand(
			'MAIL FROM',
			'MAIL FROM:<' . $from . '>' . $useVerp,
			250
			);
		}

		/**
		* Send an SMTP QUIT command.
			* Closes the socket if there is no error or the $close_on_error argument is true.
			* Implements from rfc 821: QUIT <CRLF>
			* @param boolean $close_on_error Should the connection close if an error occurs?
			* @access public
			* @return boolean
			*/
			public function quit($close_on_error = true)
			{
			$noerror = $this->sendCommand('QUIT', 'QUIT', 221);
			$err = $this->error; //Save any error
			if ($noerror or $close_on_error) {
			$this->close();
			$this->error = $err; //Restore any error from the quit command
	}
	return $noerror;
	}

	/**
	* Send an SMTP RCPT command.
		* Sets the TO argument to $toaddr.
		* Returns true if the recipient was accepted false if it was rejected.
		* Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
		* @param string $toaddr The address the message is being sent to
		* @access public
		* @return boolean
		*/
		public function recipient($toaddr)
		{
		return $this->sendCommand(
		'RCPT TO',
		'RCPT TO:<' . $toaddr . '>',
		array(250, 251)
		);
}

		/**
		* Send an SMTP RSET command.
		* Abort any transaction that is currently in progress.
		* Implements rfc 821: RSET <CRLF>
		* @access public
		* @return boolean True on success.
		*/
		public function reset()
		{
		return $this->sendCommand('RSET', 'RSET', 250);
		}

		/**
		* Send a command to an SMTP server and check its return code.
		* @param string $command       The command name - not sent to the server
		* @param string $commandstring The actual command to send
		* @param integer|array $expect     One or more expected integer success codes
		* @access protected
		* @return boolean True on success.
		*/
		protected function sendCommand($command, $commandstring, $expect)
		{
		if (!$this->connected()) {
		$this->error = array(
		'error' => "Called $command without being connected"
		);
		return false;
		}
		$this->client_send($commandstring . self::CRLF);

		$this->last_reply = $this->get_lines();
		$code = substr($this->last_reply, 0, 3);

$this->edebug('SERVER -> CLIENT: ' . $this->last_reply, self::DEBUG_SERVER);

if (!in_array($code, (array)$expect)) {
$this->error = array(
		'error' => "$command command failed",
		'smtp_code' => $code,
		'detail' => substr($this->last_reply, 4)
);
$this->edebug(
'SMTP ERROR: ' . $this->error['error'] . ': ' . $this->last_reply,
self::DEBUG_CLIENT
);
return false;
}

$this->error = array();
return true;
}

/**
* Send an SMTP SAML command.
* Starts a mail transaction from the email address specified in $from.
* Returns true if successful or false otherwise. If True
* the mail transaction is started and then one or more recipient
* commands may be called followed by a data command. This command
* will send the message to the users terminal if they are logged
* in and send them an email.
		* Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
				* @param string $from The address the message is from
				* @access public
				* @return boolean
*/
public function sendAndMail($from)
{
return $this->sendCommand('SAML', "SAML FROM:$from", 250);
}

/**
* Send an SMTP VRFY command.
* @param string $name The name to verify
* @access public
* @return boolean
*/
public function verify($name)
{
		return $this->sendCommand('VRFY', "VRFY $name", array(250, 251));
}

/**
* Send an SMTP NOOP command.
* Used to keep keep-alives alive, doesn't actually do anything
* @access public
* @return boolean
*/
public function noop()
{
return $this->sendCommand('NOOP', 'NOOP', 250);
}

/**
* Send an SMTP TURN command.
* This is an optional command for SMTP that this class does not support.
* This method is here to make the RFC821 Definition complete for this class
* and _may_ be implemented in future
* Implements from rfc 821: TURN <CRLF>
* @access public
* @return boolean
*/
public function turn()
{
$this->error = array(
'error' => 'The SMTP TURN command is not implemented'
);
$this->edebug('SMTP NOTICE: ' . $this->error['error'], self::DEBUG_CLIENT);
return false;
}

/**
	* Send raw data to the server.
	* @param string $data The data to send
     * @access public
     		* @return integer|boolean The number of bytes sent to the server or false on error
	*/
	public function client_send($data)
	{
	$this->edebug("CLIENT -> SERVER: $data", self::DEBUG_CLIENT);
	return fwrite($this->smtp_conn, $data);
	}

	/**
	* Get the latest error.
	* @access public
	* @return array
		*/
		public function getError()
		{
		return $this->error;
		}

		/**
		* Get the last reply from the server.
		* @access public
		* @return string
		*/
		public function getLastReply()
		{
		return $this->last_reply;
		}

		/**
		* Read the SMTP server's response.
		* Either before eof or socket timeout occurs on the operation.
		* With SMTP we can tell if we have more lines to read if the
		* 4th character is '-' symbol. If it is a space then we don't
		* need to read anything else.
			* @access protected
			* @return string
				*/
				protected function get_lines()
				{
				// If the connection is bad, give up straight away
				if (!is_resource($this->smtp_conn)) {
				return '';
		}
		$data = '';
		$endtime = 0;
		stream_set_timeout($this->smtp_conn, $this->Timeout);
		if ($this->Timelimit > 0) {
		$endtime = time() + $this->Timelimit;
        }
				while (is_resource($this->smtp_conn) && !feof($this->smtp_conn)) {
				$str = @fgets($this->smtp_conn, 515);
	$this->edebug("SMTP -> get_lines(): \$data was \"$data\"", self::DEBUG_LOWLEVEL);
	$this->edebug("SMTP -> get_lines(): \$str is \"$str\"", self::DEBUG_LOWLEVEL);
	$data .= $str;
	$this->edebug("SMTP -> get_lines(): \$data is \"$data\"", self::DEBUG_LOWLEVEL);
			// If 4th character is a space, we are done reading, break the loop, micro-optimisation over strlen
			if ((isset($str[3]) and $str[3] == ' ')) {
			break;
		}
		// Timed-out? Log and break
		$info = stream_get_meta_data($this->smtp_conn);
		if ($info['timed_out']) {
		$this->edebug(
		'SMTP -> get_lines(): timed-out (' . $this->Timeout . ' sec)',
		self::DEBUG_LOWLEVEL
		);
		break;
		}
		// Now check if reads took too long
		if ($endtime and time() > $endtime) {
		$this->edebug(
		'SMTP -> get_lines(): timelimit reached ('.
		$this->Timelimit . ' sec)',
		self::DEBUG_LOWLEVEL
		);
		break;
		}
		}
		return $data;
		}

		/**
		* Enable or disable VERP address generation.
		* @param boolean $enabled
		*/
		public function setVerp($enabled = false)
		{
		$this->do_verp = $enabled;
}

/**
* Get VERP address generation mode.
* @return boolean
*/
public function getVerp()
{
return $this->do_verp;
 }

 /**
 * Set debug output method.
 * @param string|callable $method The name of the mechanism to use for debugging output, or a callable to handle it.
 */
			public function setDebugOutput($method = 'echo')
			{
			$this->Debugoutput = $method;
}

/**
* Get debug output method.
* @return string
*/
public function getDebugOutput()
{
return $this->Debugoutput;
}

/**
* Set debug output level.
			* @param integer $level
			*/
				public function setDebugLevel($level = 0)
				{
				$this->do_debug = $level;
				}

				/**
				* Get debug output level.
				* @return integer
				*/
				public function getDebugLevel()
				{
				return $this->do_debug;
				}

				/**
				* Set SMTP timeout.
				* @param integer $timeout
				*/
				public function setTimeout($timeout = 0)
				{
				$this->Timeout = $timeout;
				}

				/**
				* Get SMTP timeout.
					* @return integer
					*/
					public function getTimeout()
    {
        return $this->Timeout;
				}
				}